Using JMeter's HTTP Header Manager

In our last post, JMeter's Superpower: The HTTP Proxy Server, we discussed how to use the HTTP Proxy Server to record testing scenarios.

The HTTP Proxy Server automatically adds the HTTP Header Manager in JMeter to each request. This manager is the magic lasso that contains and maintains the HTTP headers that are sent to the server from the browser in use for scenario recording.

Table of Contents: 

• What is HTTP header manager in JMeter? 
• HTTP headers
• The HTTP header manager in JMeter: The solution
• Using the HTTP header manager in JMeter: Single request
• HTTP header manager in JMeter: Headers from different managers

What is HTTP header manager in JMeter? 

The http header manager in JMeter is the magic lasso that contains and maintains the HTTP headers that are sent to the server from the browser in use for scenerio recording.  Each time the browser sends a request to a server, headers with additional information are attached to the request. 

Each time the browser sends a request to a server, headers with additional information are attached to the request. When documenting to the HTTP protocol, a large number of them are described. Still, a group with many used headers can be allocated: Accept-Language, Accept-Encoding, User-Agent, Referer.

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HTTP Headers

Standard Headers: 

JMeter has captured headers from the latest manager via the test plan, but nothing was altered in pre-existing headers.

Be careful now. Don't lose any more of your head.....ers.

This blog post was updated for accuracy in July 2021.

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Related Resources:

• The JMeter HTTP Request: How and When to Use It